From the ITF website: https://www.itftennis.com/en/news-and-media/articles/2020-itf-seniors-world-championships-dates-locations-information/
2020 ITF Seniors (50-55-60) World Team & Individual Championships
*POSTPONED*
Updated April 23, 2020: Postponed till 2021, dates TBA
Location
Team Championships: Boca Raton, Florida, USA
Individual Championships: Palm Beach Gardens, Florida, USA
Dates
As of 17 March 2020, the ITF Seniors (50-55-60) World Team & Individual Championships is postponed as a precautionary measure linked to the potential impact of the COVID-19 virus on the event.
Every effort will be made by the host organisers, USTA and ITF to reschedule the event for a later date in 2020 provided a safe, viable date can be identified. Further updates relating to this will follow in due course.
Venues
Team Championships: Boca Raton, Florida, USA
Individual Championships: Palm Beach Gardens, Florida, USA
Fact Sheet
The fact sheet for both the Team & Individual Championships are available below should they be helpful to you in contacting hotels in the City. They will remain until the end of March for this purpose.